Abstract: A pulse tool, in particular a pulse nutsetter, has a drive unit and a pulse unit driven by it. The pulse unit has at least one rotor with at least two vanes, a hydraulic cylinder surrounding it and a drive spindle protruding at one end out of the hydraulic cylinder through a front plate. The front plate is arranged between the rotor and a front cover, the cover being formed with a hydraulic fluid filling device. In order to improve a pulse tool of this nature, in that deviations from the desired pulse frequencies can be compensated in a simple manner and in particular already during the assembly of the pulse tool, the front plate has at least one bypass opening connecting the high-pressure and low-pressure chambers which are separated by the vanes. The pulse tool may also include an appropriate front plate.

Abstract: The invention relates to a tool (1), in particular an impact wrench, with a pulse unit (6) having a hydraulic impact mechanism (7) and a drive unit (24). The working volume (5) can be connected within the hydraulic impact mechanism (7) to an additional volume (4) formed outside of the mechanism. The tool according to the invention is characterised in that at least the compensating volume (4) can be varied independently of the pressure.

Abstract: A pulse tool, in particular a pulse nutsetter, has at least one pneumatic drive unit with a drive rotor and a pulse unit driven by the drive unit, wherein a delay-dependent inertial cut-off device is assigned to the drive unit for the interruption of the air feed on acquiring a cut-off pules. A pulse tool of this nature is improved to the effect that it has or facilitates a compact design, a low weight and simultaneously, a fast cut-off by the inertial cut-off device. This is achieved by the inertial cut-off device having at least one cut-off piston for changing the air feed between the open and closed positions and which can be moved relative to the drive rotor and an, essentially annular, inertial body which can turn with the drive rotor. Due to the inertial body, on acquiring the cut-off pulse at least one drive body, essentially radially adjustable relative to the drive rotor, can be deflected due to an internal contour.

Abstract: A pulse tool, in particular a pulse nutsetter, has a drive unit and a pulse unit driven by it. The pulse unit has at least one rotor with at least two vanes, a hydraulic cylinder surrounding it and a drive spindle protruding at one end out of the hydraulic cylinder through a front plate. The front plate is arranged between the rotor and a front cover, said cover being formed with a hydraulic fluid filling device. In order to improve a pulse tool of this nature, in that deviations from the desired pulse frequencies can be compensated in a simple manner and in particular already during the assembly of the pulse tool, the front plate has at least one bypass opening connecting the high-pressure and low-pressure chambers which are separated by the vanes. The invention also relates to an appropriate front plate.

Abstract: The invention relates to a tool (1), in particular an impact wrench, with a pulse unit (6) having a hydraulic impact mechanism (7) and a drive unit (24). The working volume (5) can be connected within the hydraulic impact mechanism (7) to an additional volume (5) formed outside of the said mechanism. The tool according to the invention is characterised in that at least the compensating volume (4) can be varied independently of the pressure.

Abstract: A pulse tool, in particular a pulse nutsetter, has at least one pneumatic drive unit with a drive rotor and a pulse unit driven by the drive unit, wherein a delay-dependent inertial cut-off device is assigned to the drive unit for the interruption of the air feed on acquiring a cut-off pulse. A pulse tool of this nature is improved to the effect that it has or facilitates a compact design, a low weight and simultaneously a fast cut-off by the inertial cut-off device. This is achieved in that the inertial cut-off device has at least one cut-off piston for changing the air feed between the open and closed positions and which can be moved relative to the drive rotor and an, essentially annular, inertial body which can turn with the drive rotor. Due to the inertial body, on acquiring the cut-off pulse at least one drive body, essentially radially adjustable relative to the drive rotor, can be deflected by means of an internal contour.

Abstract: An air motor, especially for a screwer, comprises an air rotor which is rotatably supported in a motor cylinder and comprises a plurality of longitudinal slits extending in the longitudinal direction of the rotor for radially guiding lamellae, the air rotor and motor cylinder having formed thereinbetween chambers which can be brought into communication with an air inlet and/or an air outlet. To achieve a high efficiency of the motor together with a more uniform accelerating power, a reduced sound level and less wear while the exhaust air throttling measures are reduced at the same time, the motor cylinder comprises an inner chamber of an essentially triangular cross-section, one chamber each being formed between air rotor and a triangle tip.

Abstract: An air motor, especially for a screwer, comprises an air rotor which is rotatably supported in a motor cylinder and comprises a plurality of longitudinal slits extending in the longitudinal direction of the rotor for radially guiding lamellae, the air rotor and motor cylinder having formed thereinbetween chambers which can be brought into communication with an air inlet and/or an air outlet. To achieve a high efficiency of the motor together with a more uniform accelerating power, a reduced sound level and less wear while the exhaust air throttling measures are reduced at the same time, the motor cylinder comprises an inner chamber of an essentially triangular cross-section, one chamber each being formed between air rotor and a triangle tip.